Normally, I don't update early to avoid bugs.
So as usual, I ran
sudo pacman -Su to check the update size. It asked that it needs to update 2 packages first, so I updated them and then checked the update size and went to sleep.
An hour later, I see a black window with large text that said that lock screen has broken and I should go to ctrl+alt+f1 and run a command
loginctl unlock-session. that didn't help so I forced shutdown the system and rebooted.
Then it showed a black screen with a window in top left that said it couldn't start kdeinit and I should check my installation.
So I finally gave up and updated the system. rebooted and everything worked fine, except for that everything looked blurred, but turns out that it was just my spectacles that were dirty
So in short, I can say it's quite an flawless update.